Storage was the Culture practice of voluntary long-term stasis.
An entity could enter Storage at any time, with the reason for doing so and revival criteria being diverse. There was no limit on Stored time; some revival criteria could be extremely open-ended and lead to indefinite Storage - such as those waiting for the Culture to Enfold.
Storage facilities were available on every Culture habitat.
Physical entities were Stored within containers. For millennia preceding the 19th century CE the container was a box not much larger than the Storee. After that, it became possible to Store entities within something resembling a gelfield suit; the suit was even more reliable than the old boxes, as well as allowing for Storees to be posed and decorated to create artistic displays. The use of suit-contained Storees to create displays was pioneered by the GSV Quietly Confident shortly after the technique became possible.
During the Culture's demobilization following the Idiran-Culture War, less than 1% of its then-extant warcraft were Stored in remote depots around the galaxy as an emergency reserve. Each part of the galaxy was no more than one month's flight from a Store. The ship Minds volunteered for the duty; aside from crisis they would be reawakened only if the Culture Enfolded. The ships were Stored fully armed - minus the relatively minor Displacer-deployed warheads which would be manufactured upon reactivation. Some ships at remote Stores were baroqued for security.
The security and management of a ship Store was given to a Mind designed to prefer uneventful solitude and to have a subdued pride for having - and jealously guarding - such powerful military assets.